<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 1、输入2个数，计算两者的和，打印到页面中
        let a=+prompt('请输入第一个数字');
        let b=+prompt('请输入第二个数字');
        console.log(a+b);
        </script>
</body>
</html>